One sector's value given: find another sector or the total

This type of question, asked 3 times: 14 Jul 2023 S2, 12 Sep 2024 S2, 18 Sep 2024 S1. All 3 questions below, oldest first.

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Question 1
14 Jul 2023 S2
55 $Study the given pie chart and answer the question that follows. The population of village D in 2020 was 10,500. What was the population of village A in 2020? Total population of these six villages is 100%.$
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Question 2
12 Sep 2024 S2
73 $The following pie chart shows the study time of different subjects of a student in a day. Study the pie chart and answer the question. If the student studied English for 3 hours, then he studied Mathematics for:$
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Question 3
18 Sep 2024 S1
66 $In 2010, a company's total expenditure was categorised under different expense heads, and their percentage distribution is illustrated in the bar graph given below. If the expenditure on an advertisement is ₹2.1 crore, then the difference between the expenditure on transport and taxes is?$
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Question 1